4CR420A KOYO Four-row cylindrical roller bearings

Brand Name: KOYO
Model Number: 4CR420A
Cone Part Number: K38880
Design Units: Imperial
Cage Type: Stamped Steel
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1: 86700 lbf
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2: 22500 lbf
d: 10.3750 in
B - Cone Width: 1.1250 in
R - Cone Backface To Clear Radius3: 0.06 in
PDF 4CR420A

Product Details

Cone Part Number K38880
Design Units Imperial
Cage Type Stamped Steel
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1 86700 lbf
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2 22500 lbf
d 10.3750 in
B - Cone Width 1.1250 in
R - Cone Backface To Clear Radius3 0.06 in
da - Cone Frontface Backing Diameter 10.83 in
db - Cone Backface Backing Diameter 10.83 in
Ab - Cage-Cone Frontface Clearance 0.1 in
Aa - Cage-Cone Backface Clearance 0.01 in
a - Effective Center Location4 0.8 in
C90 - Dynamic Radial Rating (90 million revolutions)5 12900 lbf
C1 - Dynamic Radial Rating (1 million revolutions)6 49800 lbf
C0 - Static Radial Rating 125000 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)7 8080 lbf
K - Factor8 1.6
G1 - Heat Generation Factor (Roller-Raceway) 1028.2
G2 - Heat Generation Factor (Rib-Roller End) 496.4
Cg - Geometry Factor 0.168
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Company Profile

Phone 409-782-6227
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